Sparking plug



H. SINGLETON-GHIEASBACHJ.

sPARKmG PLUG. APPLIIMTION FILED AUGJO, 1920.

1,378,569. Patented May17,1921.

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HENRY SWGL-ETOMGe/ESBACH ytb/s.v

UNITED STATES PATENT QFFICE..

SPARKING PLUG.

Specification of Letters Patent.

Patented May 1'?, 1921.

Application filed August 10, 1920. Serial No. 402,677.

T0 a?! w ,7mm t may concern Be it known that I, HENRY SINGLETON- lnmseacr-I, a subject of the King of Great Britain, and residing at Coopers Building, Liverpool, Great Britain, have invented certain new and useful Improvements in and Relating to Sparking Plugs, of which the following is a full, clear, and exact description.

This invention relates to sparking plugs ior the ignition of the charge within internal combustion engines and has for its object to provide an improved construction whereby the average temperature of the plug shall be kept down to the lowest possible ligure when in use.

For convenience in cleaning and renewal means are provided for complete dismantling of the components which means also allow of adjustment being made to the spark gap when assembled.

It is proposed to provide the outer portion oi' a plug casing with cooling ribs and to retain the insulator byV a perforated cap screwing on the casing, the distinguishing feature being that such perforated cap covers such ribbed portion of the casing.

It is illustrated in the accompanying drawings Figures .l and 2 which represent, l? l, a part sectional elevation and Fig.- 2, a plan ci? the spark cap points. Referring to these it will be seen that the body A has a gilled upper portion F with a seat for the electrode D, corresponds to the arrow marked on C, while the projection E, on the vthe basel of porcelain (which is O'enerally embedded in the body of the plug (l) by suitable shape of electrode D, to conduct the heat from the point to the cool porcelain C, more rapidly than is possible in other plugs (5)` to provide for the adjustment of Vthe gap between the electrode and the body and to give instant accessibilityl to all parts for cleaning and replacing. Y Y.

Modiiications in construction to meet the above described requirements or variations will. be obvious to those skilled in the art and can be eiiected without'exceeding the scope of this invention.

Having now particularly described `and ascertained the nature of my said invention and in what manner the same is to be performed I declare that what I claim is 1. A spark plug comprising a hollow member, provided with cooling tins, an electrode within said hollow member an insulator partially surrounding said electrode rand seated on `said hollow member, and a 

